| /* |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| #include "FailoverManager.h" |
| #include "qpid/Exception.h" |
| #include "qpid/log/Statement.h" |
| |
| |
| namespace qpid { |
| namespace client { |
| |
| using qpid::sys::Monitor; |
| |
| FailoverManager::FailoverManager(const ConnectionSettings& s, |
| ReconnectionStrategy* rs) : settings(s), strategy(rs), state(IDLE) {} |
| |
| void FailoverManager::execute(Command& c) |
| { |
| bool retry = false; |
| bool completed = false; |
| while (!completed) { |
| try { |
| AsyncSession session = connect().newSession(); |
| c.execute(session, retry); |
| session.sync();//TODO: shouldn't be required |
| session.close(); |
| completed = true; |
| } catch(const TransportFailure&) { |
| retry = true; |
| } |
| } |
| } |
| |
| void FailoverManager::close() |
| { |
| Monitor::ScopedLock l(lock); |
| connection.close(); |
| } |
| |
| Connection& FailoverManager::connect(std::vector<Url> brokers) |
| { |
| Monitor::ScopedLock l(lock); |
| if (state == CANT_CONNECT) { |
| state = IDLE;//retry |
| } |
| while (!connection.isOpen()) { |
| if (state == CONNECTING) { |
| lock.wait(); |
| } else if (state == CANT_CONNECT) { |
| throw CannotConnectException("Cannot establish a connection"); |
| } else { |
| state = CONNECTING; |
| Connection c; |
| attempt(c, settings, brokers.empty() ? connection.getKnownBrokers() : brokers); |
| if (c.isOpen()) state = IDLE; |
| else state = CANT_CONNECT; |
| connection = c; |
| lock.notifyAll(); |
| } |
| } |
| return connection; |
| } |
| |
| Connection& FailoverManager::getConnection() |
| { |
| Monitor::ScopedLock l(lock); |
| return connection; |
| } |
| |
| void FailoverManager::attempt(Connection& c, ConnectionSettings s, std::vector<Url> urls) |
| { |
| Monitor::ScopedUnlock u(lock); |
| if (strategy) strategy->editUrlList(urls); |
| if (urls.empty()) { |
| attempt(c, s); |
| } else { |
| for (std::vector<Url>::const_iterator i = urls.begin(); i != urls.end() && !c.isOpen(); ++i) { |
| for (Url::const_iterator j = i->begin(); j != i->end() && !c.isOpen(); ++j) { |
| const TcpAddress* tcp = j->get<TcpAddress>(); |
| if (tcp) { |
| s.host = tcp->host; |
| s.port = tcp->port; |
| attempt(c, s); |
| } |
| } |
| } |
| } |
| } |
| |
| void FailoverManager::attempt(Connection& c, ConnectionSettings s) |
| { |
| try { |
| QPID_LOG(info, "Attempting to connect to " << s.host << " on " << s.port << "..."); |
| c.open(s); |
| QPID_LOG(info, "Connected to " << s.host << " on " << s.port); |
| } catch (const Exception& e) { |
| QPID_LOG(info, "Could not connect to " << s.host << " on " << s.port << ": " << e.what()); |
| } |
| } |
| |
| |
| }} // namespace qpid::client |